From: Greg KH on
2.6.34-stable review patch. If anyone has any objections, please let me know.


From: Jan Beulich <JBeulich(a)>

commit cdc6e3d3968052cebb2f2ddcd742bff29fbd1a90 upstream.

Without CONFIG_CPUMASK_OFFSTACK, simply inverting cpu_online_mask leads
to CPUs beyond nr_cpu_ids to be displayed twice and CPUs not even
possible to be displayed as offline.

Signed-off-by: Jan Beulich <jbeulich(a)>
Cc: Andi Kleen <ak(a)>
Cc: Stephen Rothwell <sfr(a)>
Signed-off-by: Andrew Morton <akpm(a)>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)>

drivers/base/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -186,7 +186,7 @@ static ssize_t print_cpus_offline(struct
/* display offline cpus < nr_cpu_ids */
if (!alloc_cpumask_var(&offline, GFP_KERNEL))
return -ENOMEM;
- cpumask_complement(offline, cpu_online_mask);
+ cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask);
n = cpulist_scnprintf(buf, len, offline);

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)
More majordomo info at
Please read the FAQ at